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Page 2 of 3 <br /> >>> "Frank Girardi [EH]" <fgirardi@sjcehd.com> 3/13/2009 8:55 AM >>> <br /> Hamid, looking at the Job Description Letter (WP)the pizo's are described as follows: <br /> "15-foot-deep piezometers... The pipes in the upper 5 feet are going to be solid pipes while the <br /> rest are perforated". <br /> Comment: I interpret this as a 10 foot screen interval 5 to 15 feet below surface grade (bsg). <br /> "Around the pipes in the bottom 8 feet will be filled with sand and 2 feet of bentonite above the <br /> sand. The upper 5 feet, around the solid pipe, will be grouted. <br /> Comment: The proposed construction of the well is inadequate. Installation of the sand should not <br /> terminate at 8 feet(which is with-in the proposed 10 foot screen interval). Sand shall be installed one <br /> foot above the screen interval. If a 10 foot screen is being used, then 11 feet of sand should be installed, <br /> with 2 feet of bentonite plug on top of the sand, then the remaining shall be grouted to surface. (15' TD — <br /> 11' sand —2' bentonite = 2 feet of grout). Would you be able to revise the WP accordingly? Thanks. <br /> Frank Girardi, Senior REHS <br /> 600 E. Main Street <br /> Stockton, CA 95202 <br /> (209) 953-7868 (Office) <br /> (209)468-0341 (Fax) <br /> e-mail: fgirardi@sjcehd.com <br /> From: Hamid Parsa [mailto:HParsa@kleinfelder.com] <br /> Sent: Thursday, March 12, 2009 3:54 PM <br /> To: Frank Girardi [EH] <br /> Subject: Job Description Letter <br /> Hi Frank <br /> 3/13/2009 <br />